Fifteen.See also the Related Link.More about Abraham, Isaac and JacobHow old was Abraham's son Isaac when Abraham died
Israel.
jacob
who were the grandchildren of Abraham in the old testament
Abraham was the grandfather. Isaac was the son. He was seventy-five when his father died.Jacob was the grandson. He was 15 when his grandfather died.See also the Related Link.More about Abraham, Isaac and Jacob
Joseph
No. His only grandson , Abraham Lincoln II died at age 17.
Esau, the son of Isaac.
Abraham lincons great grandson
No Samuel is not the great-grandson of Abraham. Samuel's father was Elkanah, his father was Jeroham and his was Elihu.- Samuel 1:1 Elihu mention here is not the same Elihu mention at Job 32:1,2 who may have been a distant relative of Abraham.
If we're discussing biblical figures, then yes. Abraham was the first person referred to as "Hebrew", and Jacob was Abraham's grandson.
There is no such conflict. Abraham and his grandson Israel were never in conflict according to the Bible. There is also no conflict between the patriarch Abraham and the Modern State of Israel.